Internal gas burner and removable liner members



37 38 E iq- $543,688 Feb. 27, 1951 E. G. DE CORIOLIS ETAL INTERNAL GAS BURNER AND REMOVABLE LINER MEMBERS Filed April 26, 1947 5 3' JNVENTORS 56 0E GO/F/OL/S WLf/SRER wmw Patented Feb. 27, 1951 INTERNAL GAS BURNER AND REMOVABLE LINER MEMBERS Ernest G. de Coriolis and WilliamLehrer, Toledo, Ohio, assignors to Surface Combustion Corporation; Toledo; Ohio, a corporation of'Ohio Application April 26, 1947', SerialNo. 744,130

2 Claims. (Cl. 158-99) adapted to withstand relatively high temperatures without damage and berelatively simple to manufacture and withal be well adapted for its intended purpose,.which is for use in connection with the heating of a continuously moving line of material as, for examplametal in strip form. For a consideration of what we believe to be novel andourinvention, attention is directed to the following specification and the claims appended thereto.

In the accompanying drawing,

Fig. l is an isometric view of certain parts of the improved burner, the view being on an enlarged scale as compared with Fig. 2, which is a transverse sectional view of the burner. Figs. 3 and 4 are elevatiorral views of separate end elements of. the burner. Fig.5 is an enlarged fragmentary sectional view on line 5-5 of- Fig. '7.

Fig. 6 is a partial side elevation and sectional view of the improved burner with-an intermediate portion omitted. Fig. '7 is a fragmentary secticnal view of parts shown in Fig. 2 except for a modified form of combustion-space 32. Fig. 8 is a diagrammatic view showingthe improvedburners arranged in upper and lower groups to fire towards both the top and bottom sides of a line of strip metal l supported on a bed of rollers 2 and moving into and through a heat treating furnace I. I

The improved burner comprises a plurality of ceramic backing blocks l3 adapted to be arranged in two laterally spaced and longitudinally extending rows to form between themselves a longitudinally extending channel for a purpose presently appearing. Referring to Fig. 2, the righthand blocks I3 are indicated by It and left-hand blocks by I5. The blocks are each adapted to be disposed against a flat wall member 24 of a longitudinall extending support generally indicated by l6 and to be held thereagainst by U-bolts I! each adapted to be received in a side recess 18 of the block and to extend through said member. Short side walls 2!! depend from said wall member 24- to form a guide way between which said backing blocks are mounted.

There is positioned in the channel between the two rows of backing blocks 83 two laterally spaced and longitudinally extending rows of refractory lining members 25 for said blocks to define a relatively narrow combustion space for the combustible mixture issuing from a multi-apertured inlet 2 28 in the flat. wall member 24 in line. with. said space and defined by alongitudinally extending supply tube 2 i at the backside of said wall member 24. The right hand lining members 25 are indicated by 26 and the left-hand members by 21. In Fig. 2 the said combustion spaceis shown as comprising a restricted passage 29 between primary and secondary combustion zones 30 and 3| but, as shown in Fig. '7, the said space may be of uniform width from top to bottom as indicated by 32. Generally speaking, it is the kind of gas to be burned that determines the preferred shapeof. the combustion space. Thus, for relativelyv slow-burning gases like natural gas, propane, butane, etc., a relatively restricted passage 29 between the two relatively wider combustion zones is found to be advantageous in-promoting rapid combustion whereas in the case of manufactured gas like ordinary city gas there is no particular advantage in providing. any such restricted passage.

The paired liningmembers 25 areheldin place in the channelbetween the two rows of backing blocks I3 by providing. on the block-facing side of the lining members a longitudinally extending lateral projection and by providing in the channelside of the backing blocks a set-back d6 corresponding in shape to the said lateral probetween the rows a series of spacer elements 35,

said elements being positioned at the joints between adjacent ends of the lining members and being held in place by extending part way into the side of each row in a lateral pocket resulting from side notches 36 in the adjacent corner edges of said ends as will be readily understood by reference to Fig. l. The spacer elements are of more or less stream-line form and, by reason of terminating far short of the outlet side of the combustion space, the longitudinal continuity of the issuing flame is not objectionally interrupted by said elements.

At each of its longitudinal ends, the combustion space is closed by refractory slab 31 which in turn is backed by a heating insulating slab 38. A cross bar 39 carried by the support [6 serves as a retaining barrier behind the outer slab 38.

At its ends, the fuel supply tube 2| is preferably closed by a removable head member 33 so as to permit ready access to interior of the tube for removing dirt which may tend to clog the orifice of the gas outlet 28. Combustible mixture is supplied to said tube by a conduit means 34 leading from a suitable source of supply.

As best shown in Fig. 5, the longitudinal gas outlet 28 of the tube 2| will ordinarily consist of a multiplicity of relatively small-diameter drilled holes 40 whereby to minimize the likelihood of flame flashback into the tube. This likelihood is further minimized by reason of the tube being kept cool by the cooling water in the right and left-hand water passages 23 defined by walls 22 coacting with the back side of the flatwall member 24. The holes 40 are preferably'arranged according to the pattern shown in Fig. 5 which is to say they are arranged in two laterally spaced groups of two rows each so that the fuel issuing from one longitudinal group of holes will tend to flow in scrubbing contact with or in relatively close proximity to the next adjacent wallor face of the combustion space between the refractory members 25 and so that the fuel issuing from the other group of holes will tend to flow in scrubbing contact with or in relatively close proximity to the other wall or face of said space, this arrangement tending to produce a turbulence which tends to accelerate combustion.

From what has already been said in connection with Fig. 8, it will be understood that it is merely for descriptive purposes that in the other views the burner has been shown and described as firing downwardly.

.What is claimed as new is: 3 1. In a burner for producing a line of flame, in combination, an elongate support having a flat wall, two laterally spaced rows of backing blocks arranged along said flat wall to define between said rows an elongate channel, two laterally spaced rows of refractor lining members arranged in said channel with their backs in movable contact with said blocks to define in said channel a relatively narrow combustion space, means including a passage disposed along the back side of said flat wall and communicating through said wall for supplying combustible mixture to said combustion space, means individual to said blocks for securing the latter to the elongate support,

and means comprising stepped portions along contacting sides of the lining member and their backing blocks for retaining said lining members in said channel in longitudinal sliding relation relative to said blocks.

2. In a burner for producing a line of flame, in combination, an elongate support having a flat wall, two laterally spaced rows of backing blocks arranged along said flat wall to define between said rows an elongate channel, two laterally spaced'r ows of refractory lining members arranged in said channel to define between said members a relatively narrow combustion space, means including a passage disposed along the back side of said flat wall and communicating through said flat wall for supplying combustible mixture to said combustion space, means comprising a longitudinally extending set-back in that portion of the inner face of each backing block next adjacent said flat wall and a corresponding projection on the'block-facing side of each lining REFERENCES CITED The following references are of record in the file of thispatent:

UNITED STATES PATENTS Number Name Date 403,152 Sleicher May 14, 1889 1,298,817 Stevenson Apr. 1, 1919 2,043,867 Rava June 9, 1936 2,109,149 Horn Feb. 22, 1938 2,131,701 'Achterfeldt Sept. 27, 1938 2,398,398 Abbott- Apr. 16, 1946 2,427,545 Berger Sept. 16, 1947 2,464,333 McGlaughlin Mar. 15, 1948 

